There are so many choices...
With having 4 grandsons T-Rex would be their choice hands down.
T-Rex at Disney Springs if he is into Dino's, really fun spot.
Rain Forest if he likes other animals - you have 2 choice's either at AK or Disney Springs
Coral Reef ( Epcot)- if he like sharks, dolphins, sea turtles really cool environment, They have a card to look and find the different fish...
Teppan Edo ( Epcot) - fun watching the chef's cooking
Sci-Fi ( DHS) - cool themeing along with cheesy "B" movies.. really good milk shakes really fun - wait till they ask you did people really watch Movies like this...
Casey's ( MK) - kids love hot dogs, and they are pretty dang good...
ESPN ( Boardwalk) this is a spot that could be really great, for a older kid or one that watches or is really into sports, mostly T.V.'s, and has the sports bar feel...